EAPS 111 Exam 1 Purdue UPDATED Actual Exam Questions and CORRECT Answers
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Course
EAPS 111
Institution
EAPS 111
EAPS 111 Exam 1 Purdue UPDATED
Actual Exam Questions and CORRECT
Answers
1. A fundamental premise of plate tectonics is that the Earth's surface is made of distinct
plates. What are the kinds of evidence/observations led geoscientists to conclude this? -
CORRECT ANSWER- -The presence of fos...
EAPS 111 Exam 1 Purdue UPDATED
Actual Exam Questions and CORRECT
Answers
1. A fundamental premise of plate tectonics is that the Earth's surface is made of distinct
plates. What are the kinds of evidence/observations led geoscientists to conclude this? -
CORRECT ANSWER✔✔- -The presence of fossil evidence as well as physical boundaries
for continents and chains of seismic activity, they can fit together and plants, sediments
2. Where these plates interact (at their active boundaries) is where a significant fraction of the
tectonic activity occurs. There are 3 basic active plate boundaries types. What are they and
how would you describe the large-scale motions at each? - CORRECT ANSWER✔✔- -
Divergent- move apart
-Convergent- come together
-Transform- slide past each other
3. What are the characteristics of the three types of plate boundaries in terms of plate
motions, association of earthquakes and volcanoes, and presence or absence of mountains (or
other distinctive features)? - CORRECT ANSWER✔✔- -Divergent- results in mid ocean
ridges, lava rises out of faults created by plates moving apart
-Convergent- subduction zones, causes higher plate to rise, volcanic activity from falling
plate common. Earthquakes can result from sudden slips of the footwall.
-Transform-plates move past each other causing earthquakes, mountains or valleys not
common.
4. What does the orientation of volcanic island chains indicate? - CORRECT ANSWER✔✔-
-presences of a convergent plate boundary, which way the plate is moving
5. Can you distinguish the different plate margins from map and elevation data? - CORRECT
ANSWER✔✔- Top is above sea, bath, below sea.
6. What is convection, how does it work (think of the analogies we used in class)? -
CORRECT ANSWER✔✔- -the heating and cooling of rock creating a cycling motion.
Gravity pulls the upper cooler rock down (because it's denser) and then heats it, causing it to
rise (less dense), creating a cycling motion
, 7. Why is convection relevant to plate tectonics? - CORRECT ANSWER✔✔- -convection
drives the movement of plate tectonics, causing the rock to move either apart, together, or
past each other
8. Be able to identify and explain seafloor features and other tectonic elements on continents
and relate these to convection and plate tectonics. - CORRECT ANSWER✔✔- -seafloor
features are effected by plate tectonics as well, for example divergent plate boundaries result
in mid ocean ridges
9. Understand the details of subduction and sea floor spreading, in terms of large-scale
physical processes (i.e., convection). - CORRECT ANSWER✔✔- -Seafloor spreading is the
result in a counter clock wise and clockwise convection zone
10. How (and why) do continents grow continuously larger through time while ocean basins
grow and shrink through the actions of plate tectonics? - CORRECT ANSWER✔✔- -plate
margins are continuously rising more rock to the surface as magma, but no processes are
shrinking continent size, only causing them to grow larger
1. What is an earthquake? What are the different ways that seismic waves can be generated
(i.e., possible sources)? - CORRECT ANSWER✔✔- -earthquakes are seismic waves created
by the slipping of rock on fault boundaries (created by tectonic activity). They come from
normal faults slipping reverse faults, and strike slip faults. The can also occur from volcanic
eruptions, landslides, meteoroid impacts, and explosions
2. How do location of earthquakes relate to the 3 types of plate boundaries? How do
earthquake depths help differentiate convergent plate boundaries from others? - CORRECT
ANSWER✔✔- -The depth of the earthquake is an indication of the type of boundary. Deep
earthquakes occur at subduction zones (because the plates are moving down), strike slip
faults create shallower earthquakes.
3. What is the difference between the lithosphere and asthenosphere, and how is this
distinction related to the crust and mantle (think mechanical vs. compositional)? - CORRECT
ANSWER✔✔- -Lithosphere-mechanically ridged and solid, strong-crust
-Asthenosphere- Partially molten and weak.-mantle
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